Mechanical movement.



,f E I 4 SHEETS-SHEET I .I

F. T. JOHNSON.

MECHANICAL MOVEMENT.

APPLICATION FILED SEPT. I, I9I6.

moHNsoN.

MEGHANGAL MOVEMENT. APPLICATION m50 SEPT. 1, lala.

Patented Mar. 13, 1917,

4 SHEETS-SHEET 21 V I l. V

F. T. JOHNSON;

MECHANICAL MOVEMENT. APPLICATION FILED SEPT. 1. Isls.

`11,2 1 8,778. I Panmd Mar. 13:191-7.

4 SHEETS-SHEETl 3.

F. T. JUHNSUN. MECHANICAL MOVEMENL APPLICATION FILD SEFTJ, *916.

mama Mar. 13, 1917.

'l/vena?" FRANCIS T. JoHN'soN, or cmcaeo, rLLrNoIs.

NECHA'NICAL MovEMEN'r.

YSpeciiclstion of Letters Patent.

Patented Mar; 13, 1917.

Application'led September 1, 1916. Serial No. 117,967.'

y To all whom it may emwermiy Be it known that I, 'FRANCIS T. JOHNSON, a citizen of theUnited States, residing at Chicago, in the county of Cook `l.and State of Illinois, have invented a certain new and useful Improvement in Mechanical Movements, of which the following is a specification.

My invention relates to improvements 'in mechanical movements'and has for one object to provide a new and improved driving mechanlsim'oi mechanical movement, whereby the power which is applied to a rotating part lwill cause the oscillation of another" rotatably. mounted part, I have illustrated the invention as applied to a washing machine, but it is 'perfectly obvious that the scope of my device is not to be limited to such use.

The invention is illustrated more or less diagrammatically 4in the accompanying drawings, wherein- Figure 1 shows .an end elevation with parts broken away;

- Fig. 2 is a section along the line 2-2 of Fig. 1; i

Fig. 3 Fig. 2; Fig. Fig. 3; `Fig. Fi 2;

` Fig. is a section along the line 6-6 of Fig.' 5';

Fig.

is a section along the line'3-3 of 4 is a section along the line Lle--A of 5 is a section along the line 4)#5 of 7 is .a detail View of control handle andY associated parts;

' Fi 8 isa section along the line 8-78 of Fig.

Fig. 9 a detail with parts-broken away 4and omitted, showing a modified form;

Fig. 10 is'. a section along theline 10-410 Fig 11 section along the line 11-11 of Fig. 9;

Fig. 12 is a sectionalong the line 12212 of Fig. 10;

Fig. 13 details showing modified form wherein no spring is interposed between the rocker arms'.

Like )arts are indicated by like charactersin a ldrawings.

` 1 A, is the end frame ofa washing machine.

lIt carries a bearingsleeveA1 in which is rotatably mounted an axle shaft Arigidly `etlftzlletl ,to and. carrying 'l the lrotatably `side of the frame A.

mounted tub E. lThe sleeve A1 is located the inner side of the frame and the axle;

vshaft A2 extends outwardly through the rotatably mounted on the shaft A2 contained partially within the pocket formed by the sleeve supporting wall A5 on the inner side of the frame A.

The hub of the pulley A4 is provided with diametrically opposed clutch pockets A adapted to be penetrated by clutch pins A7 carried by the clutch sleeve A". This clutch sleeve A," is splined on-thefshatt A? by means of the key A. It is provided with a [lange A1n adapted to be engaged by the shitting fingers A11 on diametrica'lly opposed sides.

The yoke A3 is provided with perforations A12. The clutchpin- A7 has an extenY sion adapted to engage one or other of these perfo/rations to lock the tub in iixed position when the clutch is out of engagement with the driving pulley.

The elutch-controlling-arms A1 are mounted on a vertical shaft B, which shzift extendsupwardly along the front of the frame A. It is mounted at one end in a, bearing B1 and at the topl passes through a bracket plate B2 anchored on the frame A. The controlling handle B3 is provided for the manipulation of parts to control the clutch vand has in its upper surface dcpres-- vsions B4 adapted to be engaged` hy the spring pressed ball B5 to yieldingly lock the clutch 1n the open 'or closed position,- as the case may be.

yB/is a stop inger bolted to the frame A and extended upwardly toward the clutch member AS. vided on either side with ears B so disposed as to limit the rotary movement of the tub byengagement between the ears and the stop fingen-w` C is a motor. "It drives a pulley()1 by nieans of a b elt C2. pulley shaft C?. This pinion is inmesh with the 'gear C which gear is in mesh with the gear CG; both the .gears and pinions heilig all of them rotatably mounted on the inn-er' (lh-C are crank pins, Cprojecting outwardly from the gears O5- 6, and separatedby an angle of-`180... CL-Cyl" are rock levers mounted on these The clutch member Af' is pro C3 is a pinion on the.

-. gaged position.

crank pins, which levers carry the ends of the driving chain C, vwhich chain is wound about the pulley A* and, anchored' at one point thereon. The longer arms` of the levers are tied together by the chain or belt C, and in one form this chain or belt C has interposed between its ends, the spring shackle C13. (.)il cups C are prov-hfled ,in the upper sides of the levers for their lul rication.

In the modified form shown in Figs. 9-12 inclusive, the clutch collar D is splined on the shaft .A2 and its outward movement away from the driving pulley hub is limited by the bracket D. The clutch collar D is provided on opposite sides with ears D2 adapted to project out so as to strike thil rib D3 on the bracket D1, if the tuh rotates through a. sufficiently wide arc. D4 is a flange'on. the clutch collar l.) notched as at D, the rib I)H being provided with a raised portion D, to engage one or other of said notchesvwhcnthe clutch is in the disen- The clutch is shifted by means of an arm D7- on a shaft D, this arm being provided at its end with a split pin D to engage Harige D4.

The use and'operation of my invention are las follows: l

The motor is operated-in the usual way to drive the pulley, which in turn causes the l driving pinion to rotate the two gears in" opposite directions. As these two 'gears rotatein opposite directions .and as they carry With them the crank pins they are separated by an oscillating or reciprocating motion, because as one pinmoves toward the driving pulley,vthe other moves away from it. This results,of course, since the belt is anchored on the driving pulley, in oscillating that pulley.

If the distance between the center of r otationof each driving lgear a'nd the center of 'rotation "of the pulley were infinity, then both sides of the'chain would always be right, because there would be no angularity tov be considered; butbecause thel distance..

betweeny the'cen'ters is short, it is evident that the movement toward and from the driving pulley of the two crank pins is not absolutely "constant, so one end of the belt may at tlmesgif the'belt is not elastic, be a little loose. v

I-n order to overcome or compensate forJ the 'slight differential action of the two crank pins, the two rocking levers are provided. By inspection it will .be seen that with .the partsjin position shown in the f ull line 'of Fig. 3, the richt hand lever is more nearly parallel with its lbelt end that is'the left'end lever. This is because just at that position, there is a. little teo much chain on the left endA side and not quite enough on the right end side. As the crank pins rotate, these levers rock slightly so as to cornpensate at all times Ior this di Terence, ihc result is that as one crank pin catches up with the normal n'iovement, the lever will rock 'from its normal inclined position toward a position in line with the chain so as to increase slightly the length .of chain more that the other lever will have rocked slightly to take up the slack on the other end of the chain, thus compensatingl at that point for the slight relative degree in 'speed of movenient of tht crank pin, With .a link connecting the tree ends of compensating levers, the levers will move in unison .and so when one takes up slack at one end of the belt, the other will. pay ont exactly the same amount of slack at the other end. Thus by' proper proportioning of the lengths of the levers the throw oi the crank pins and the length ol' thc belt, the parts can be so alranged that (he bolt will always be tight, and positive drive will always bo had.

llowcvcr. this arrangement loes not give un elasticitv n the driving connect-ions und when heavy loads a rc lo he suddenly stopped and started. it is exceedingly desirable to cushion the shock and l provide this cushion hy substituting for the length which of course is rigid, a flexible, extensible connection. lV hen this is used, however, the arrangement of the parts of it preferablyv would be so changed that the levers do not absolutely compensate for the differential components of the crank pin movements. Thus as the spring connection gives and takes the belt will always be tight, though the'load will be stopped and started. and cushioned by the normal action of thc spring.

I claim 1. A driving mechanism comprising a pair of cranks and means for rotating them in opposite directions, compensating levers rotatably mounted one upon each crank, a rotatably mounted driven member, a flexible belt in peripheral enfragement therewith, its ends being anchoredD on one of each said compensating levers.

2. A driving mechanism comprising a pair of cranks and means for rotating them -in opposite directions, compensating levers rotatably mounted one upon each crank, a

rotatably mounted driven member, a exible belt in peripheral engagement therewith= its ends being anchored on one of each said compensating levers and a strai ht line connection between the free ends o said levers.

3. A driving mechanism comprising a pair of cranks and means for rotating them in opposite directions, compensating vlevers rotatably mounted one upon each crank, a rotatably mounted driven member, a flexible belt in peripheral en agement therewith, its ends being ameliorer? compensating'levers and a Ayiel i; connection betweenthe free ends of sai-` evers.

.4. A Idriving mechanism 'comprisingi on one o fgeach said rpair of cranks and means for rotating them nopposite directions, compensating levers rotatably nlounted, one upon each crank, a rotatably mounted driven member, a flexible belt in peripheral engagement therewith, its ends being anchored on one of each said :ompensating levers and a straight line connection between the free ends of said levers,

the free arms of said levers being bent 1nwa rdly toward one another.

5, A driving* mechanism comprising a )air of cranks and means for rotating them 1n opposite directions, compensating levers rotatably mounted one upon each crank, a rotatably monn ted driven member, a. flexible belt in peripheral engagenient therewith, its ends being anchored on one of each said compensating levers and a yielding connection between the free ends of said leifer, the

free' arms of said levers'being bent inwardly toward one another.

6. A driving mechanism comprising a pair of cranks separated by an angle of 1800,'and means ,for rotatin r them in opposite directions, a compensating bellfcrank lever mounted on each crank, a. rotatably mounteddriving member, a flexible belt in peripheral engagement therewith, its ends being attached tothe ends of said cranks and a straight line flexible connection between the free ends of said cranks.

In testimony whereor` I affix my signature in the presence of two witnesses thls 16th day of August, 1916.

FRANCIS T. JOHNSON.

Witnesses:

MARION L. INenAn'AM, RUTH E. CARLSON. 

